Dabkinganswered grow question 6 months ago Hard to tell without a jewelers loupe or something that can give at least give good magnification. Maybe get your smart phone and see if it has a "macro" option and take a photo that way.
Harvesting is all preference. If you want more of a sativa/less sluggish high then harvest early. If you want a heavy indica feeling high, harvest when the trichromes are mostly amber, as the THC will break down and start converting into CBN (will make you feel tired).
If its an autoflower, a decent time to chop without looking is around day 77-84.
Most people will tell you to wait. It's all preference brother. The peak THC production is around 5-10% amber trichs. Hope this helps